> For the complete documentation index, see [llms.txt](https://docs.cw.crisisworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cw.crisisworks.com/security-and-support/technical-reference/merge-template-reference/css-reference.md).

# CSS Reference

For users with web development experience, the following contains the built-in rules, along with the default additional CSS rules. These rules can be inserted into your HTML editor during local development.

## Base CSS (built-in)

The Base CSS is built into each page **and cannot be changed**.

While the CSS itself cannot be changed, you can:

* Adjust the variables at the top — these align to settings available in the merge template form.
* Override the CSS using [Additional CSS](#additional-css)

```css
/* Variables */
:root {
    /* overall page dimensions */
    --firstPageTopMargin: 10mm;
    --firstPageBottomMargin: 10mm;
    --pageTopMargin: 10mm;
    --pageBottomMargin: 10mm;
    --height: 297mm;
    --mediaPrintTopMargin: 20mm !important; /* page header */
    --mediaPrintBottomMargin: 20mm !important; /* page footer */

    /* to set a background, use url(https://path/to/your/background.png) */
    --letterheadFile: none; 

    /* margins for the letter content */
    --topMargin: 20mm;
    --leftMargin: 0mm;
    --rightMargin: 0mm;

    /* address positioning from top left of page */
    --addressLeft: 20mm;
    --addressTop: 80mm;
}
```

```css
/* The base CSS rules */
@page:first {
    size: A4;
    margin-top: var(--firstPageTopMargin)mm;
    margin-left: 0mm;
    margin-right: 0mm;
    margin-bottom: var(--firstPageBottomMargin)mm;
}
@page {
    size: A4;
    margin-top: var(--pageTopMargin)mm;
    margin-left: 0mm;
    margin-right: 0mm;
    margin-bottom: var(--pageBottomMargin)mm;
}

@media print {
    html, body {
        width: 210mm;
        height: var(--height); /* only set if defined */
        margin-top: var(--mediaPrintTopMargin);
        margin-left: 0mm;
        margin-right: 0mm;
        margin-bottom: var(--mediaPrintBottomMargin);
    }
}

body {
    background: white;
    background-image: var(--letterheadFile);
    background-size: 210mm var(--height);
    background-repeat: no-repeat;
    font-family: 'Signika', sans-serif;
    font-size: 12pt;
}

hr {
    color: white;
    height: 0px;
    border: none;
    page-break-after: always;
    clear: both;
}

img.media {
    float: left;
    width: 46%;
    padding: 0px 10px 10px;
}

img.signature {
    width: 50mm;
    float: none;
    padding: 0px 10px 10px;
}

article {
    margin-top: var(--topMargin); /* only applies to first page */
    margin-left: var(--leftMargin);
    margin-right: var(--rightMargin);
}

address {
    left: var(--addressLeft);
    top: var(--addressTop);
    position: absolute;
    font-style: normal;
}

table td {
    vertical-align: top;
    text-align: left;
}

img {
    padding: 4mm;
}

br {
    clear: both;
}
```

## Additional CSS (customisable)

The Additional CSS is user-configurable. The following is a good starting point, which provides the classes used in this guide.

{% hint style="success" %}
This CSS is automatically included for new templates. You can adjust this to suit your needs.
{% endhint %}

```css
/* Set the default font for the document - everything is relative to this. */
body {
    font-size: 11pt !important;
    font-family: arial, helvetica, sans-serif;
}

/* Define the headings relative to the default font */
h1 {
    font-size: 125%;
    font-weight: bold;
}

h2 {
    font-size: 100%;
    font-weight: bold;
}

h3 {
    font-size: 80%;
    font-weight: bold;
    font-variant: small-caps;
}


/* Create left and right anchored text boxes */
.left-box {
    float: left;
    width: 49%;
}

.right-box {
    float: right;
    width: 49%;
}

/* Here's a big, red, important box for an important message */
.warning-box {
    border: 1px solid #ff0000;
    color: #ff0000;
    background-color: #ffcaca;
    padding: 4mm;
}

/* Create left, right, center and justify text styles */
.left-text {
    text-align: left;
}

.right-text {
    text-align: right;
}

.center-text {
    text-align: center;
}

.justify-text {
    text-align: justify;
}

/* Text for fine-print - can be wrapped multiple times */
.small-text {
    font-size: 85%;
}

/* Big, red warning text */
.warning-text {
    color: #ff0000;
    font-weight: bold;
}

```


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